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<br />December 2003 <br /> <br />Table 1 Endpoints and Attributes <br /> <br />Endpoint Attrlbut. Description <br />NATIVE FISH - M5 PEstabhsh Reports the probability of establishing a viable population of humpback chub in the malnstem Colorado River <br />HUMPBACK ., <br />CHUB <br /> LCR-EU Reports the effect of an option on chub abundance in the Little Colorado River. The summary indictor EU is the expected <br /> -'E>< utility of an option as a functIon of Its "risk profile" tor LCR chub abundance. The risk profile is defined by assuming thi!lt for <br /> each option there are only three possible outcomes for chub abundance: P Ex is the probability of extirpation, P Same is the <br /> -PSame probability that there will be no change from current; and P Healthy IS the probability of a return to healthy population size. <br /> The EU rejXlrU the utility or value of the resulting risk profile, assuming standard values for risk aversion (i.e., avoiding a loss <br /> -P Healthy is more valuable than realizinll an equivalent lIain). <br />SPORT FISH. Abundance Reports expected abundance of raintxr.Y trout,. 150 mm In reach above Lees Ferry. <br />RAINBOW (thousands) <br />TROUT <br /> Size (pounds) Reports average expected size of rainbow trout above Lees Ferry <br /> Probability of Reports the probability that the abundance of rainbow trout above Lees Ferry WIll decline by 50S: or more. <br /> Collapse ('1:) <br />SAND Trend in Storalle The slope of change in total sand storage over a 10 yr period. A negative value indicates more sand is being exported than is <br />DEPOSITION being retained. A positive value indicates an accumulation of sediment. <br /> (slope) <br /> Total Sand Area The area of sand above 25 kefs relative to the amount present In 1984. ThIs represents the amount of sand available for <br /> abave25 kcfs Aeolian transport, campsites, and potential marsh development In theory. this effect is aNered by other attnbutes (e.g., <br /> hIstoric properties and campsite availability. <br /> <br />4 <br />GCDAMP MATA: <br />December 2003 Workshop Report <br />